Roosmalens’ Dwarf Marmoset

• Common Name: Black-crowned Dwarf Marmoset
• Taxonomy Classification Year: 1998
• Monkey Size: 38 to 39 cm (15 to 15.5 in)
• Skin Color(s): Dark olive-brown
• Habitat: Rainforest
• Diet: Omnivorous
• Native Countries: Brazil

The Roosmalens dwarf marmoset^[1], also called the black-crowned Pygmy marmoset or black-crowned dwarf marmoset is a New-World monkey endemic to the Amazon rainforest west of the Aripuana River and the east bank of the lower Madeira River in Brazil.

• The upper parts of the Roosmalens dwarf marmoset are mostly dark olive-brown, while the underside is pale, yellowish, and dull.
• A crown of whitish hair frames the pale, bare pinkish face. The crown is blackish, as the alternative common name suggests; black-crowned pygmy marmoset.
• The species has claws instead of nails like other common marmosets that feed on tree sap. Also, it has teeth similar to other common marmosets.

• The Roosmalens dwarf marmoset has several unique characteristics, which have led to it sometimes being placed in the monotypic Callibella genus. However, genetic analysis later led to their classification in the Mico genus.
• Roosmalens dwarf marmoset was first classified in 1998 after being discovered 400 km (250 miles) south of Manaus.
• It’s the second smallest monkey species, only the related pygmy marmoset is smaller.
• The species is considered unusual among marmosets in giving birth to a single baby instead of twins, which is common among marmosets.
• Often, they are very territorial, although this is not the case with the Roosmalens pygmy marmosets, where it’s common for multiple females in a group to have their offspring rather than one dominant female.